DORFNER Analysenzentrum und Anlagenplanungsgesellschaft mbH
Scharhof 1, 92242 Hirschau
Fon: +49 9622 82-162
Silica, quartz, glass sand, processing, beneficiation, deposit


The two most abundant elements in the earth’s crust, silicon and oxygen, occur in eight crystalline mineral forms, and an amorphous variety, of silica (SiO2). The most common variety, quartz, occurs in all rock types and is exploited from vein-like intrusive igneous rocks, such as coarsely crystalline pegmatite, silica sand, or metamorphic quartzite.

Exceptional chemical purity, particle size and shape characteristics, and access to market define the commercial realities for silica. Silica deposits possessing these characteristics are relatively rare. However, the stock of silica resource is broadened by the use of an array of processing techniques to meet variably stringent specifications to well above 99% SiO2 for applications in glass, ceramics, refractories, metallurgy, fillers, abrasives, proppants, filtration, and chemicals industries.